Semi-Anechoic Chambers
The Compliance-Test Workhorse for Radiated Emissions and Immunity
Semi-anechoic chambers (SAC) are the workhorse facility for commercial EMC compliance testing, combining a conductive ground plane with absorber-lined walls and ceiling to provide a controlled test environment for both radiated emissions and immunity testing to standards like CISPR and IEC 61000-4-3.
Available in 3m, 5m, and 10m measurement distance configurations with quiet zones from 1.5m to 8.0m, these chambers scale from small component and device testing up to full vehicle testing with sliding gate vehicle access on the largest 10m models.
Where This Fits
The SAC is the core testing environment in most EMC facilities — the compliance-test workhorse for both radiated emissions and radiated immunity under CISPR and IEC 61000-4-3. If you're building a general-purpose commercial test facility rather than one built around a specific niche standard, this is usually where to start.
Sizing comes down to what you test and the standard you test to: 3m for benchtop and small-to-medium equipment, 5m/10m for larger EUTs or where a standard specifies a longer measurement distance. See Specialty EMC Chambers and GTEM Cell Chambers below for when a standard SAC isn't the right fit, and Chamber Accessories for the supporting infrastructure every chamber needs to actually run.
